body {
    background: linear-gradient(135deg, #1a2a6c, #0f3460);
    color: #fff;
}
.dashboard-title {
    color: #fff;
    text-shadow: 0 0 15px rgba(0,195,255,0.7);
}
.data-card {
    background: rgba(13, 28, 46, 0.95);
    border: 1px solid rgba(0,195,255,0.3);
    box-shadow: 0 4px 12px rgba(0,195,255,0.2);
    position: relative;
    overflow: hidden;
}
.data-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0,195,255,0.2),
        transparent
    );
    transition: 0.5s;
}
.data-card:hover::before {
    left: 100%;
}
.data-card:hover {
    box-shadow: 0 8px 25px rgba(0,195,255,0.35);
    border-color: rgba(0,195,255,0.5);
}
.data-title {
    color: #00c3ff;
    font-weight: 500;
}
.data-value {
    color: #fff;
    text-shadow: 0 0 10px rgba(0,195,255,0.5);
}
.data-trend {
    color: #7fdbff;
}
.theme-selector {
    background-color: rgba(13, 28, 46, 0.9);
    color: #00c3ff;
    border: 1px solid rgba(0,195,255,0.3);
    box-shadow: 0 0 10px rgba(0,195,255,0.2);
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http://www.w3.org/2000/svg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2300c3ff%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22/%3E%3C/svg%3E');
}
.theme-selector option {
    background-color: #0d1c2e;
    color: #00c3ff;
} 